Presentation Transcript

Slide 1:

Sound Longitudinal wave
requires a medium
(cannot travel in a vacuum)

Slide 2:

is known as
ACOUSTICS Study of Sound

Slide 3:

Properties of Sound A sound is a vibration
The vibrating causes the air molecules near the movement to be forced closer. This is called compression
As the vibration moves on, the density and air pressure becomes lower than normal and is called rarefaction
Pressure wave – longitudinal
Frequency = pitch
v = 334 m/s in air at room temperature
Velocity is dependent upon the material

Slide 4:

Do molecules move faster or slower as temperature increases? So would sound travel faster or slower as temperature increases? Temperature Can
affect
speed

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Slide 7:

Sound travels faster in warm water than in cold water
By measuring the time it takes for sound to travel a known distance through the ocean the average temperature of the water can be calculated = ATOC (acoustic thermometry of ocean climate) Speed of sound